After Learning C,C++ and Python.. What Else Should I Learn to Develop My Hacking Skills?

Hello Null Byte..

I'm just curious, i have no specific requirements or fields that i want to be specialized in, like Web exploitation or OS hacking. i don't prefer one thing over the other.

all i want is to know and understand better how things work, how to create my own Exploits, how to build my own remote administration tool, how to crypt, and most important how to use what i learn to do all that..i mean i might have the tools(programming language) but i don't know how to use it yet.

so what shall i do next? to build on what i've learn and be able to use(C,C++ and python) more effectively in hacking .. should i start learning Networking?, Assembly?, or Web languages?.

PS.. i also have a background on basic Linux and my learning it now, but i want to learn something else along with Linux.

any thoughts would be appreciated..